AS path fugliness?

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1

Anyone else receiving huge as-path (more than 125) causing these:

Jul 3 08:23:06 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 268
Jul 3 08:23:46 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 270
Jul 3 08:27:45 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 274
Jul 3 08:31:59 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 268
Jul 3 08:41:02 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 268
Jul 3 08:41:43 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 270
Jul 3 08:57:56 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 268
Jul 3 09:04:04 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 268
Jul 3 09:10:01 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 268
Jul 3 09:10:52 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 270
Jul 3 09:17:40 MDT: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for
aspath, requested size 268

(per http://www.cisco.com/warp/public/459/35.shtml )

It started just after local Qwest routes apparently recovered from some kind
of nose-dive. We're still sorting through the tables trying to find out who,
thus far longest I've found is about 20.

Mike

2

Anyone else receiving huge as-path (more than 125) causing these:

Yes, but I saw it only once from four different sources:

Through AS1:

Jul 3 07:23:56: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for aspath, requested size 266

Through AS6461:

Jul 3 07:22:51: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for aspath, requested size 266

Through AS2828:

Jul 3 07:22:52: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for aspath, requested size 266

Through AS4513:

Jul 3 07:22:47: %BGP-3-INSUFCHUNKS: Insufficient chunk pools for aspath, requested size 266

-mark

3

Of course it would be towards the end of the table.

Here's a sample of the more detailed log at http://www.rockynet.com/wtf.html

*>i205.139.72.0 a.b.c.d 101 0 3561 23037
{1239,1785,2379,4323,4513,4546,4969,5006,5676,5778,6181,6253,6347,6395,6453,
6580,6993,7132,7795,10242,10346,10492,10625,10674,10726,10851,10910,10937,10
957,11101,11134,11169,11589,11657,11853,12094,12156,12163,12175,12221,13350,
13371,13443,13488,13568,13576,13578,13641,13790,13815,13882,14021,14130,1428
9,14359,14381,14452,14549,14564,14677,14685,14929,14990,15062,15150,15214,15
215,16477,16504,16554,16597,16631,16640,16707,16782,16852,16980,17033,17060,
17253,17304,18480,18548,18565,18618,18862,18866,18903,18957,19019,19024,1954
1,19746,19893,20045,20303,20316,20357,20458,21536,21591,21715,21822,21853,22
191,22219,22242,22299,22319,22389,22406,22476,22728,22764,22912,22960,23195,
23269,23306,23365,25639,25707,25905,26004} ?

* i a.b.c.d 101 0 3561 23037
{1239,1785,2379,4323,4513,4546,4969,5006,5676,5778,6181,6253,6347,6395,6453,
6580,6993,7132,7795,10242,10346,10492,10625,10674,10726,10851,10910,10937,10
957,11101,11134,11169,11589,11657,11853,12094,12156,12163,12175,12221,13350,
13371,13443,13488,13568,13576,13578,13641,13790,13815,13882,14021,14130,1428
9,14359,14381,14452,14549,14564,14677,14685,14929,14990,15062,15150,15214,15
215,16477,16504,16554,16597,16631,16640,16707,16782,16852,16980,17033,17060,
17253,17304,18480,18548,18565,18618,18862,18866,18903,18957,19019,19024,1954
1,19746,19893,20045,20303,20316,20357,20458,21536,21591,21715,21822,21853,22
191,22219,22242,22299,22319,22389,22406,22476,22728,22764,22912,22960,23195,
23269,23306,23365,25639,25707,25905,26004} ?

* e.f.g.h 25 0 701 3561 23037
{1239,1785,2379,4323,4513,4546,4969,5006,5676,5778,6181,6253,6347,6395,6453,
6580,6993,7132,7795,10242,10346,10492,10625,10674,10726,10851,10910,10937,10
957,11101,11134,11169,11589,11657,11853,12094,12156,12163,12175,12221,13350,
13371,13443,13488,13568,13576,13578,13641,13790,13815,13882,14021,14130,1428
9,14359,14381,14452,14549,14564,14677,14685,14929,14990,15062,15150,15214,15
215,16477,16504,16554,16597,16631,16640,16707,16782,16852,16980,17033,17060,
17253,17304,18480,18548,18565,18618,18862,18866,18903,18957,19019,19024,1954
1,19746,19893,20045,20303,20316,20357,20458,21536,21591,21715,21822,21853,22
191,22219,22242,22299,22319,22389,22406,22476,22728,22764,22912,22960,23195,
23269,23306,23365,25639,25707,25905,26004} ?

neighbor ids's are munged, otherwise it's a straight dump of what we're
getting. I've gotten two other confirmations as well.

Mike

4

We've had 4 crashes with chunk corruption....

5

I see the same from AS 16517 -

*> 205.139.72.0 216.177.55.5 500 15076 701 3561 23037 {80,109,122,...

Note that our paths diverge after AS 23037
Could IMC Internet (ASN-IMC-BGP) be the source of the problem.

Regards
Marshall Eubanks

Mike Lewinski wrote:

6

Date: Wed, 3 Jul 2002 10:12:42 -0600
From: Mike Lewinski

Of course it would be towards the end of the table.

Here's a sample of the more detailed log at http://www.rockynet.com/wtf.html

*>i205.139.72.0 a.b.c.d 101 0 3561 23037
{1239,1785,2379,4323,4513,4546,4969,5006,5676,5778,6181,6253,6347,6395,6453,
6580,6993,7132,7795,10242,10346,10492,10625,10674,10726,10851,10910,10937,10
957,11101,11134,11169,11589,11657,11853,12094,12156,12163,12175,12221,13350,
13371,13443,13488,13568,13576,13578,13641,13790,13815,13882,14021,14130,1428
9,14359,14381,14452,14549,14564,14677,14685,14929,14990,15062,15150,15214,15
215,16477,16504,16554,16597,16631,16640,16707,16782,16852,16980,17033,17060,
17253,17304,18480,18548,18565,18618,18862,18866,18903,18957,19019,19024,1954
1,19746,19893,20045,20303,20316,20357,20458,21536,21591,21715,21822,21853,22
191,22219,22242,22299,22319,22389,22406,22476,22728,22764,22912,22960,23195,
23269,23306,23365,25639,25707,25905,26004} ?

1239 is sending ^1239_23037$ instead of the ugly mess... 19358
hears the sane path via ^1239_, ^3549_1239_, and ^6347_1239_.

23037 experimenting with as-set in a very bad way?

Eddy

7

"Marshall Eubanks" wrote:

I see the same from AS 16517 -

*> 205.139.72.0 216.177.55.5 500 15076 701
3561 23037 {80,109,122,...

Note that our paths diverge after AS 23037
Could IMC Internet (ASN-IMC-BGP) be the source of the problem.

We've opened a ticket with C&W. The tech I spoke with wasn't aware of this
issue. It does appear that all affected netblocks are IMC Internet, and that
C&W provides the IP space to them.

Mike

8

Date: Wed, 3 Jul 2002 10:40:58 -0600
From: Mike Lewinski

*> 205.139.72.0 216.177.55.5 500 15076 701 3561
                                      23037 {80,109,122,...

We've opened a ticket with C&W. The tech I spoke with wasn't
aware of this issue. It does appear that all affected
netblocks are IMC Internet, and that C&W provides the IP
space to them.

...and 23037 is the last AS hop before the screwy AS_SET mess.
(Note the curly braces in the as-path.)

Telnet to 166.63.158.166 gives a Nortel banner. nmap guesses
"Bay Networks BLN-2 Network Router or ASN Processor Revision 9".
Any known issues with Bay/Nortel BGP? Any ways run amok with
AS_SET?

Eddy

9

This has disappeared from here...

Marshall Eubanks wrote: